KR20100012944A - Power transfer apparatus, non-contact wireless power supply system and method - Google Patents

Power transfer apparatus, non-contact wireless power supply system and method Download PDF

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Publication number
KR20100012944A
KR20100012944A KR1020080074392A KR20080074392A KR20100012944A KR 20100012944 A KR20100012944 A KR 20100012944A KR 1020080074392 A KR1020080074392 A KR 1020080074392A KR 20080074392 A KR20080074392 A KR 20080074392A KR 20100012944 A KR20100012944 A KR 20100012944A
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KR
South Korea
Prior art keywords
power
wireless
portable terminal
means
side
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KR1020080074392A
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Korean (ko)
Inventor
김경수
김영주
김준희
임현승
Original Assignee
태산엘시디 주식회사
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Priority to KR1020080074392A priority Critical patent/KR20100012944A/en
Publication of KR20100012944A publication Critical patent/KR20100012944A/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/022Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter
    • H02J7/025Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter using non-contact coupling, e.g. inductive, capacitive
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40Circuits

Abstract

The present invention relates to a non-contact wireless power supply technique. Unlike the conventional method of generating a transmission power at a fixed resonance frequency and transmitting it to the portable terminal when the access of the portable terminal is confirmed for execution of the power transfer mode, the portable terminal When the power transmission mode of the furnace is executed, the resonance frequency value for generation of the transmission power is adaptively adjusted based on the power value detected by the portable terminal, and the transmission power is generated based on the adaptively adjusted resonance frequency. It is possible to effectively increase the power transfer efficiency from the power transmission device to the portable terminal.

Description

Power transmission device and non-contact wireless power supply system using same and method thereof {POWER TRANSFER APPARATUS, NON-CONTACT WIRELESS POWER SUPPLY SYSTEM AND METHOD}

The present invention relates to a non-contact wireless power supply technique, and more particularly, to adaptively adjust the resonant frequency for generating the transmission power based on the power value at the portable terminal side when supplying the transmission power from the power transmitter to the portable terminal side. The present invention relates to a power supply device suitable for the present invention, a non-contact wireless power supply system using the same, and a method thereof.

As is well known, portable devices, such as mobile phones, DMB terminals, satellite terminals, PDAs, PMPs, MP3s, MP3Ps, etc., have built-in rechargeable batteries, which are equipped with a charging contact terminal (contact electrode). Contact charging methods using a holder having a connection or a connection with a USB port provided in a computer are mainly used.

However, in the conventional method of charging a mobile terminal using a contact charging method, it may take a lot of inconveniences such as fixing the mobile terminal to a charging cradle or connecting to a USB port of a computer through a USB connector. There was no choice but to.

In particular, in the case of such a contact charging method, a problem of electric shock due to contact, a problem of externally damaged contact electrodes due to external factors, a problem of poor contact due to dust, and physical contact It was accompanied by various problems such as the problem of device damage.

As one method for improving the above problems, recently, a technology for a non-contact charging method, for example, using a separate transformer has been developed and applied to portable terminals instead of a contact charging method.

As described above, in the non-contact charging method using a separate transformer or the like, a primary coil module is built in a contactless charger (power transmitting device) and a secondary coil module is built in a battery pack side of a mobile terminal. The induced electromotive force is used to charge the battery of the mobile terminal (or supply operating power in the mobile terminal).

That is, according to the conventional method, the power transmission device transmits power to the portable terminal side through generation of transmission power based on the resonance frequency optimized and fixed to the primary coil on the transmission device side.

Therefore, the mobile terminal users can charge the battery built in the mobile terminal possessed by the user through a simple method using the non-contact power charging method. Of course, not only the battery charging but also the contactless power supply may be provided with the operating power required by the mobile terminal.

On the other hand, the above-described conventional method of wirelessly transmitting power required by the portable terminal side in a non-contact method is a mechanical switch or wireless communication to recognize the approach of the portable terminal when the portable terminal approaches the power supply region of the power transmission device. By adding a function and determining the power supply by determining the state of the switch or the received terminal information, power is sent only when necessary to prevent waste of power.

In general, it is known that the power transfer efficiency is maximized when the resonance conditions of the transmitting side (power transmitting device) and the receiving side (portable terminal) match. Therefore, in order to improve the efficiency of power transmission, it is very important to optimally adjust the resonance conditions of the transmitting side and the receiving side.

On the other hand, in power delivery, it may be considered that it is most ideal that the transmit power amount and the receive power amount match, which is merely an abnormality and the received power amount becomes smaller than the transmit power amount due to various external factors occurring on the power transmission path. Is the reality.

However, if it is possible to check the amount of received power at the portable terminal side and adaptively adjust the resonant frequency for generation of outgoing power at the transmitter side based on the checked amount of received power, the power transfer efficiency may be maximized.

However, in the conventional method described above, when the approach of the portable terminal is confirmed, the transmission power is generated using only a fixed resonance frequency. If a reduction occurs, there is a problem in that it does not respond properly, that is, the power transmission efficiency is lowered.

The present invention provides, according to one aspect of the present invention, power generation means for generating outgoing power based on a resonance frequency value determined by a control means for execution of a power delivery mode in response to proximity detection of a portable terminal; Receiving one side wireless power transmission means for releasing the transmitted power to the other side wireless power receiving means provided on the portable terminal side, and information data of the portable terminal wirelessly transmitted from the other side wireless communication means provided on the portable terminal side; Adaptively adjusting a resonant frequency value for generation of the transmission power based on one side wireless communication means, means for demodulating the received information data into the original signal before modulation, and a power value included in the demodulated information data, The control means for providing this adaptively adjusted resonant frequency value to the power generation means. It provides a signal transmission apparatus.

The present invention provides power generation means for generating outgoing power based on a resonant frequency value determined by a control means for executing a power delivery mode in response to the approach detection of the portable terminal, and the generated outgoing power on the portable terminal side. Demodulates the power value of the mobile terminal received from the other wireless transmission / reception means through the induced electromotive force induced by the one wireless transmission / reception means into the original signal before modulation And power supply means for adaptively adjusting a resonant frequency value for generation of the output power based on the demodulated power value, and providing the adaptively adjusted resonant frequency value to the power generation means. Provide the device.

According to one aspect of the present invention, the resonant frequency value is adaptively adjusted based on the power value at the portable terminal side which is wirelessly transmitted from the portable terminal side during execution of the power transfer mode and received via the one side wireless communication means, A power transmission device configured to induce transmission power generated on the basis of the adaptively adjusted resonant frequency value through one wireless power transmission means, and transmit the power to the portable terminal; and received through induced electromotive force in the other wireless power reception means. Converts and outputs a power radio signal corresponding to the transmission power to a DC power source usable on the portable terminal side, detects the power value on the portable terminal side during execution of the power transfer mode, and converts the detected power value to the other side wireless Radio transmission through communication means and transfer to the power transmission device side It provides a contactless wireless power supply system comprising a portable terminal.

According to another aspect of the present invention, the present invention adaptively adjusts the resonant frequency value based on the power value provided from the portable terminal side during execution of the power transfer mode, and outputs generated based on the adaptively adjusted resonant frequency value. A power transmitting device for discharging power through one side wireless transmitting and receiving unit to the portable terminal, and a power wireless signal corresponding to the transmitting power received through induced electromotive force in the other wireless transmitting and receiving unit at the portable terminal side A portable terminal which converts and outputs into a usable DC power source, detects a power value on the portable terminal side during execution of the power transfer mode, and transmits the detected power value to the power transmitting device side through the other wireless transmission / reception means. It provides a contactless wireless power supply system comprising a.

According to one aspect of the present invention, when the portable terminal approaches the power supply region of the power transmitting device, the present invention generates the power transmitting device through induced electromotive force between one wireless power transmitting means and the other wireless power receiving means. Performing a power transmission mode for wirelessly transmitting one transmission power to the portable terminal side; and a direct current power source capable of using the portable terminal side with a power radio signal corresponding to the transmission power received through the other wireless power receiving means. A power value at the portable terminal side during the execution of the power transfer mode, and outputs the detected power value wirelessly through the other wireless communication means to transmit one side of the power transmission device side. Forwarding the received message to the electronic device; On the basis of the values it provides a process and a non-contact wireless power supply method comprising the step of generating the transmission power by using the adaptive adjustment of the resonance frequency value adapted to adjust the resonance frequency value for the generation of the transmission power.

According to another aspect of the present invention, when the portable terminal approaches the power supply region of the power transmission device, the transmission power generated by the power transmission device through the induced electromotive force between one side and the other wireless transmission and reception means Executing a power transmission mode wirelessly transmitting to the portable terminal, and converting and outputting a power radio signal corresponding to the outgoing power received through the other wireless transmission / reception means into a DC power source usable by the portable terminal; And detecting a power value at the portable terminal side during execution of the power transfer mode, and transmitting the detected power value to the power transmitting device side through induced electromotive force induced between the one side and the other wireless transmitting and receiving means; A resonance note for generation of the output power based on the power value Using the process of adaptation to adjust the number and value, the adaptive control of the resonance frequency value, and provides the non-contact wireless power supply method comprising the step of generating the transmission power.

The present invention, by executing the power transfer mode to the portable terminal, by adaptively adjusting the resonant frequency value for the generation of the transmission power based on the power value detected by the portable terminal, the power from the power transmission device to the portable terminal It is possible to further enhance the transfer efficiency.

The technical gist of the present invention is different from the above-described conventional method of generating transmission power at a fixed resonance frequency and transmitting it to the portable terminal when the access of the portable terminal is confirmed to execute the power transfer mode. When the mode is executed, the resonance frequency value for generation of transmission power is adaptively adjusted based on the power value detected by the portable terminal, and the transmission power is generated based on the adaptively adjusted resonance frequency. Through these technical means, problems in the conventional manner can be effectively improved.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

Example 1

1 is a block diagram of a contactless wireless power supply system according to a first embodiment of the present invention, Figure 1 is a block diagram of a contactless wireless power supply system according to a preferred embodiment of the present invention, when largely divided And a power transmission device 110 and a portable terminal 120, the power transmission device 110 of the present invention includes a control block 111, a power generation block 113, a wireless power transmission block 115, and wireless communication. And a block 117 and a signal processing block 119, and the portable terminal 120 includes a wireless power receiving block 121, a signal processing block 122, a control block 123, a power processing block 124, Power sensor 125, wireless communication block 126, and the like. That is, one power transmission path and another data communication path are provided between the power transmission device 110 and the portable terminal 120 constituting the contactless wireless power supply system of the present embodiment.

Here, the power transmission device 110 of the present invention may be configured in various forms, such as a pad type, a cup type, a basket type, and the like, and the portable terminal 120 may be, for example, a mobile phone, a DMB terminal, a satellite terminal, or a PDA. , PMP, MP3, MP3P, digital camera, camcorder, notebook computer.

Referring to FIG. 1, the control block 111 includes, for example, a microprocessor for performing overall operation control in the power transmission device, and the portable terminal 120 approaches a predetermined position (power supply area) in the device. Generate and provide a control signal for the periodic minimum power transmission required to detect the power supply to the power generation block 113, the condition information when the terminal condition information is transmitted (received) from the signal processing block 119 to be described later It provides a function such as generating a power transmission control value (that is, resonant frequency value) for generating a power corresponding to the power generation block 113, and the like.

Here, the terminal condition information is information provided from the portable terminal 120 when the portable terminal 120 approaches the power supply region of the device, and for example, a unique number of the portable terminal, a received power of the portable terminal, a battery, and the like. Capacity, battery charge, battery temperature, and the like.

Further, the control block 111 adaptively adjusts the resonance frequency value based on the power value provided from the signal processing block 119 (that is, the detected power value on the portable terminal 120 side), and the adaptive adjusted resonance frequency value To be transmitted to the power generation block 113 as a power transmission control value. Here, adaptive adjustment of the resonant frequency value means finding an optimal frequency that maximizes the amount of received power through a frequency swing (a kind of auto tuning concept) in the 80-120 kHz band, for example, assuming that the current reference frequency is 100 kHz. it means.

Next, the power generation block 113 includes, for example, a power input terminal, a rectifying circuit, a switching circuit, a resonant circuit, and the like, and is based on the power transmission control value provided from the control block 111, and the high frequency AC power supply Power), and the generated high frequency AC power is transferred to the wireless power transmission block 115. Here, the frequency of the high frequency AC power supply is a fixed value in the case of monitoring the approach of the portable terminal, and when the access is confirmed, the coupling between the transmitting (device) side and the receiving (mobile terminal) side is optimal through a frequency swing process. Means the frequency to be.

The wireless power transmission block 115 may be configured as, for example, a primary coil of a split type transformer having a wound coil structure, and the AC power source (transmission power) for wireless transmission from the power generation block 113 may be included. When delivered, based on the induced electromotive force, it provides a function of transferring power to the wireless power receiving block 121 provided on the portable terminal 120 side. That is, the wireless power transmission block 115 functions as one power communication path for wirelessly connecting the device and the terminal.

Subsequently, the wireless communication block 117 may selectively apply one of various wireless short-range communication techniques such as induction electromotive force, RF communication, light (LED) communication, infrared communication, and the like. And a function of receiving a radio signal transmitted from the radio, ie, an access response signal, a terminal condition information signal, a power value signal of the terminal, and the like, and transmitting the received radio signal to the signal processing block 119. That is, the wireless communication block 117 functions as another data communication path for wirelessly connecting the device and the terminal.

In addition, the signal processing block 119 is a radio signal from the portable terminal 120 side received through the radio communication block 117, for example, a radio signal (terminal radio communication) for an access response signal, terminal condition information, power value, and the like. Receiving a radio signal transmitted and received in a block 126), demodulating and decoding the original signal before modulation, and transmitting the decoded access response signal, terminal condition information, and power value to the control block 111. And so on.

Referring back to FIG. 1, the wireless power receiving block 121 provided on the portable terminal 120 side may be configured as, for example, a secondary coil of a split type transformer having a coiled coil structure, and the like. It provides a function to receive the power through the induced electromotive force induced with the wireless power transmission block 115 provided on the side 110 to the power processing block 124.

At this time, a part of the power received by the power processing block 124 is used as the operating power of the control block 123 to be described later. When the portable terminal 120 approaches the power transmitter 110 and the power received by the wireless power receiving block 121 is transferred to the control block 123 via the power processing block 124, the portable terminal starts an operation. .

Next, the wireless communication block 126 wirelessly transmits a response signal transmitted from the control block 123 via the signal processing block 122 to the wireless communication block 117 on the device side after the portable terminal starts operation. When the first response signal is detected in the device side wireless communication block 117, the power transmission device 110 starts the frequency swing process. The terminal side information (that is, the information data including the power value) transferred from the wireless communication block 126 on the portable terminal 120 side to the wireless communication block 117 on the device side during the frequency swing process on the device side is maximum. It is used to determine the optimum frequency for power delivery. From the initial approach recognition, the frequency swing process can be terminated very quickly.

In addition, when the signal processing block 122 receives the response signal data such as the terminal condition information data or the power value from the control block 123, the signal processing block 122 modulates the signal into a radio transmittable signal and transmits it to the wireless communication block 126. And so on.

Next, the control block 123 includes, for example, a microprocessor for performing overall operation control of the portable terminal, and when power is received in the wireless power receiving block 121, the operating power source through the power processing block 124. After receiving (or receiving) the terminal information to generate (or withdraw) and transmits it to the signal processing block 122, and is required to process the received power radio signal when the portable terminal performs the power supply mode based on the induced electromotive force To generate various control signals and provide them to the power supply processing block 124. Here, the terminal condition information may selectively include, for example, a unique number of the portable terminal, a received power of the portable terminal, a battery capacity, a battery charge state, a battery temperature, and the like, and the terminal condition information may include various sensors not shown. The information may be provided from the information stored in the internal memory or may be information stored in the memory.

In addition, the control block 123 is provided with a power value (load power value by the detection voltage / current) from the power sensor 125 when performing the power supply mode (power transmission mode at the device side), respectively, the control block 123 It provides a function such as transferring to the signal processing block 122 as the information data, the detection and transmission of this power value is repeatedly executed at a predetermined period while performing the power supply mode (power transmission mode on the device side). Herein, the power value may be an AC power value detected before converting to DC or a DC power value detected after converting to DC.

To this end, the power sensor 125 provides a function such as detecting the load power value at the portable terminal side at a predetermined period during the initial stage or during the execution of the power supply mode and transferring the load power value to the control block 123 to the control block 123. Such a power sensor 125 can be comprised, for example with a voltage sensor and a current sensor.

Finally, the power supply processing block 124 optionally includes, for example, a rectifying circuit, a filtering circuit, a voltage / current control circuit, and the like, and is based on various control signals provided from the control block 123. The controller performs rectification, filtering, and the like on the power wireless signal (high frequency AC power supply) received through the 121, and converts the power wireless signal into a DC power suitable for use in a mobile terminal and outputs the same. Here, the output DC power may be provided as charging power of a battery (not shown) built in the portable terminal or may be provided as an operating power of the portable terminal.

Next, FIGS. 1 and 3 will be described with respect to a series of procedures for wirelessly supplying power required by the portable terminal according to the present invention using the non-contact wireless power supply system according to the present embodiment having the above-described configuration. It demonstrates with reference.

3 is a flowchart illustrating a process of adaptively supplying wireless power to a portable terminal from a power transmission device side in a non-contact manner according to the present invention.

Referring to FIG. 3, the power transmission apparatus 110 periodically transmits power at a predetermined frequency through the wireless power transmission block 115 while performing the standby mode, and transmits power to the mobile terminal through the wireless communication block 117. 120, access (step 302).

On the other hand, when the portable terminal 120 approaches a position capable of wireless power transfer, the control block 123 of the portable terminal receives power from the power processing block 124 and starts an operation.

In addition, the control block 123 generates or retrieves the terminal condition information and transmits it to the signal processing block 122. The signal processing block 122 encodes the terminal condition information and modulates the terminal condition information into a signal that can be transmitted wirelessly. 126, and as a result, a radio signal corresponding to the terminal condition information is wirelessly transmitted from the radio communication block 126 and initially transmitted (received) to the radio communication block 117 provided on the power transmission device 110 side. As a result, the terminal condition information is wirelessly transmitted to the power transmitting apparatus 110 so that the access between the apparatus and the terminal is recognized with each other (step 304). Here, the terminal condition information includes information for controlling the supply power generation on the power transmitting device 110 side. For example, the terminal condition information includes a unique number of the portable terminal, a received power of the portable terminal, a battery capacity, a battery charge state, a battery temperature, and the like. It may optionally include.

Subsequently, the signal processing block 119 on the power transmission device 110 performs signal processing (demodulation, decoding, etc. on the original signal before modulation) on the terminal condition information received through the wireless communication block 117. The decoded terminal condition information is passed to the control block 111 (step 306).

In the control block 111, the control signal for generating power corresponding to the first terminal condition information transmitted from the signal processing block 119, that is, the start of the operating frequency range set in the memory is divided according to the type of the portable terminal. A power transmission control value (or a power transmission control signal) including a clock signal for generation of power having a frequency is generated and transferred to the power generation block 113 to start a frequency swing process (step 308).

In response, the power generation block 113 generates high frequency AC power based on the power transmission control value provided from the control block 111, and the AC power generated as described above is transferred to the wireless power transmission block 115. As a result, the induced electromotive force is induced to the wireless power receiving block 121 provided on the portable terminal 120 (step 310).

Therefore, the power induced by the induced electromotive force from the wireless power transmission block 115 on the device side to the wireless power reception block 121 on the terminal side is measured from the power sensor 125 and transferred to the control block 123 on the portable terminal side. The control block 1123 transfers the received power value in the terminal information to the signal processing block 122, and the power value received through the wireless communication block 126 is wirelessly transmitted to the power transmission device 110. do.

In the signal processing block 119 on the side of the power transmission device 110, signal processing (demodulation, decoding, etc. of the original signal before modulation) is performed on the terminal information received through the wireless communication block 117 and then controlled. Forward to block 111 (step 312).

In response, the control block 111 detects the power value from the received signal (step 314) and stores it in the internal RAM with the operating frequency for comparison, completing the first cycle for autotuning. The second cycle determines the next operating frequency according to a predefined frequency interval and returns to step 308. When the second cycle is over according to the procedure described above, the detected power value is compared with the power value in the first cycle, and the larger value is stored in memory along with the frequency, and the number of cycles determined according to the preset frequency swing range and interval Repeat as much (step 316).

At this time, since the power delivered to the mobile terminal decreases after recording a peak within a predetermined frequency range, the cycle may be terminated at the time of reduction.

As a result, an operating frequency capable of delivering maximum power from a predetermined frequency range is determined according to the type of portable terminal (step 318), and then, in the power generation block 113, based on the transmission power adjustment value (adapted adjusted resonant frequency). One outgoing power is generated and delivered to the wireless power transmission block 115 (step 320).

That is, according to the present embodiment, when the power transmission device executes the power transfer mode to the portable terminal, the resonance is determined according to the power value provided from the portable terminal side through a separate data communication path rather than a path for power transfer. By using the frequency, it is possible to adaptively adjust the generation of the output power amount at the apparatus side so that the reception power amount is optimal.

Example 2

FIG. 2 is a block diagram of a non-contact wireless power supply system according to a second embodiment of the present invention. In general, the power transmission device 210 and the portable terminal 220 may be included in the present invention. The device 210 includes a control block 211, a power generation block 213, a wireless transmission / reception block 215, a signal processing block 217, and the like, and the mobile terminal 220 includes a wireless transmission / reception block 221, a signal, and the like. A processing block 222, a control block 223, a power processing block 224, a power sensor 225, and the like. That is, one wireless communication path is provided between the power transmission device 210 and the portable terminal 220 constituting the contactless wireless power supply system of the present embodiment.

In the non-contact wireless power supply system according to the present embodiment, unlike the above-described Embodiment 1 each having a wireless communication path for power wireless signal and a data communication path for receiving information from the portable terminal, one wireless communication It transmits and receives a power radio signal and information on the portable terminal (eg, an access response signal, terminal condition information, power value information, etc.) through a path, and has a difference from the above-described Embodiment 1 in view of this. The wireless communication for transmission may selectively apply any one of various wireless short-range communication techniques such as amplitude shift keying (ASK), phase shift keying (PSK), frequency shift keying (FSK), and the like.

In the present embodiment, the control block 211 on the power transmission device 210 side is the control block 111 of FIG. 1, the power generation block 213 is the power generation block 113 of FIG. 1, and signal processing. The block 217 is substantially the same in function as the signal processing block 119 of FIG. 1, and the signal processing block 222 of the portable terminal 220 side is similar to the signal processing block 122 of FIG. 1. The control block 223 is the control block 123 of FIG. 1, the power processing block 224 is the power processing block 124 of FIG. 1, and the power sensor 225 is the power sensor 125 of FIG. 1. Substantially identical in function.

Therefore, hereinafter, detailed descriptions of the corresponding constituent members that provide substantially the same functions will be omitted in order to avoid unnecessary overlapping descriptions for brevity of the specification.

To this end, the wireless transmission and reception block 215 of the power transmission device 210 may be configured as, for example, a primary coil of a split type transformer having a wound coil structure, and the access sensing power supply from the power generation block 213. When (micro AC power) or AC power (transmission power) for wireless transmission is transmitted, it is induced based on induced electromotive force to the wireless transmission / reception block 221 provided on the portable terminal 220 side (for access detection or power use). Transmits a radio signal), receives a radio terminal information signal from the radio transmission / reception block 221 on the portable terminal 220 side, and transmits the radio signal to the signal processing block 217.

In addition, the wireless transmission / reception block 221 of the portable terminal 220 may be configured as, for example, a secondary coil of a split type transformer having a wound coil structure, and wireless transmission / reception provided at the power transmission device 210 side. The wireless transmission / reception block 215 of the power transmission device 210 by transmitting / receiving a radio signal (access detection or power radio signal, terminal condition information radio signal, etc.) through induced electromotive force with block 215. When the induced electromotive force (access recognition signal) corresponding to the approach detection power supply from is received and transmitted to the signal processing block 222, from the signal processing block 222, the terminal condition information (encoding and When a radio signal for the modulated terminal condition information is transmitted, a corresponding induced electromotive force is generated to be induced (wireless transmission) to the wireless transmission / reception block 215 on the power transmission device 210 side. When the induced electromotive force (power induced electromotive force) corresponding to the high frequency AC power is induced from the wireless transmission / reception block 215 on the side of the power transmission device 210, it is received (receiving a power radio signal) to process the power processing block 224. And generate induced electromotive force corresponding thereto when the modulated power value is transmitted from the signal processing block 222 to induce (wireless transmission) to the wireless transmission / reception block 215 on the power transmission device 210 side. Provides the functionality of

That is, in the non-contact wireless power supply system of the present embodiment, the power transmission and reception through the single wireless communication path of a pair of the wireless transmission and reception block 215 provided on the device side and the wireless transmission and reception block 221 provided on the terminal side. And reception of information from the portable terminal.

Next, FIGS. 2 and 3 will be described with respect to a series of procedures for wirelessly supplying power required by the portable terminal according to the present invention using the non-contact wireless power supply system according to the present embodiment having the above-described configuration. It demonstrates with reference.

Referring to FIG. 3, the power transmission device 210 monitors the approach of the mobile terminal 220 while periodically transmitting power at a predetermined frequency through the wireless transmission / reception block 215 while performing the standby mode (step 302).

On the other hand, when the mobile terminal 220 approaches a location capable of wireless power transfer, the control block 223 of the mobile terminal receives power from the power processing block 224 and starts an operation. The control block 223 generates or retrieves the terminal condition information and transmits the terminal condition information to the signal processing block 222. The signal processing block 222 encodes the terminal condition information and modulates the terminal condition information into a radio signal. As a result, a radio signal corresponding to the terminal condition information is wirelessly transmitted from the wireless transmission / reception block 221 to be initially transmitted (received) to the wireless transmission / reception block 215 on the power transmission device 210 side, thereby Approaches between terminals are recognized with each other (step 304). Here, the terminal condition information includes information for controlling the supply power generation on the power transmitting device 210 side, for example, selectively identifying the unique number of the portable terminal, the received power of the portable terminal, the battery capacity, the state of charge of the battery, and the like. It may include.

Subsequently, the signal processing block 217 on the power transmission device 210 performs signal processing (demodulation, decoding, etc., on the original signal before modulation) on the terminal condition information received through the wireless transmission / reception block 215. The decoded terminal condition information is passed to the control block 211 (step 306).

In the control block 211, a control signal for generating power corresponding to the initial terminal condition information transmitted from the signal processing block 217, that is, the start of the operating frequency range set in the memory is divided according to the type of the mobile terminal. A power transmission control value (or a power transmission control signal) including a clock signal for generation of power having a frequency is generated and transferred to the power generation block 213 to start a frequency swing process (step 308).

In response, the power generation block 213 generates high-frequency AC power based on the power transmission control value provided from the control block 211, and the AC power generated in this way is transmitted to the wireless transmission / reception block 215. In step 310, the induced electromotive force for power is transferred to the wireless transmission / reception block 221 provided on the portable terminal 220 side.

Accordingly, the power induced by the induced electromotive force from the wireless transmit / receive block 215 on the device side to the wireless transmit / receive block 221 on the terminal side is measured from the power sensor 225 and transferred to the control block 223 on the portable terminal side. The control block 223 transfers the received power value to the terminal information to the signal processing block 222, and the power value received through the wireless transmission / reception block 221 is wirelessly transmitted to the power transmission device 210.

 In the signal processing block 217 on the power transmission device 210 side, the signal processing (demodulation, decoding, etc. of the original signal before modulation) is performed on the terminal information received through the wireless transmission / reception block 215 and then controlled. Transfer to block 211 (step 312).

In response, the control block 211 detects the power value from the received signal (step 314), and stores it in the internal RAM with the operating frequency for comparison to complete the first cycle for autotuning. The second cycle determines the next operating frequency according to a predefined frequency interval and returns to step 308. When the second cycle is over according to the procedure described above, the detected power value is compared with the power value in the first cycle, and the larger value is stored in memory along with the frequency, and the number of cycles determined according to the preset frequency swing range and interval Repeat as much (step 316).

At this time, since the power delivered to the mobile terminal decreases after recording a peak within a predetermined frequency range, the cycle may be terminated at the time of decrease.

As a result, an operating frequency capable of delivering maximum power from a predetermined frequency range is determined according to the type of portable terminal (step 318), and then, in the power generation block 213, based on the transmission power adjustment value (adapted adjusted resonant frequency). One outgoing power is generated and transmitted to the wireless transmission / reception block 215 (step 320).

That is, according to the present embodiment, when the power transmitting apparatus executes the power transfer mode to the portable terminal, by using the resonance frequency determined according to the power value provided from the portable terminal side through the wireless communication path for power transmission, It is possible to adaptively adjust the generation of outgoing power on the device side so that the received power is optimal.

In the above description has been described by presenting a preferred embodiment of the present invention, but the present invention is not necessarily limited thereto, and those skilled in the art to which the present invention pertains have various scope within the technical spirit of the present invention. It will be readily appreciated that branch substitutions, modifications and variations are possible.

1 is a block diagram of a non-contact wireless power supply system according to a first embodiment of the present invention;

2 is a block diagram of a non-contact wireless power supply system according to a second embodiment of the present invention;

3 is a flowchart illustrating a process of adaptively supplying power to a portable terminal from a power transmission device side in a non-contact manner according to the present invention.

<Description of the code | symbol about the principal part of drawing>

110, 210: power transmission device

111, 211: control block

113,213: Power Generation Block

115: wireless power transmission block

117, 126: wireless communication block

119, 122, 217, 222: signal processing block

120, 220: portable terminal

124, 224: power processing block

125, 225: power sensor

215, 221: wireless transmission and reception block

Claims (25)

  1. Power generation means for generating outgoing power based on a resonant frequency value determined by the control means for executing the power transfer mode in response to the approach detection of the portable terminal;
    One side wireless power transmission means for inducing the generated power to the other side wireless power receiving means provided in the portable terminal;
    One side wireless communication means for receiving information data of the portable terminal wirelessly transmitted from the other side wireless communication means provided on the portable terminal side;
    Means for demodulating the received information data into the original signal before modulation;
    The control means for adaptively adjusting the resonant frequency value for generation of the output power based on the power value included in the demodulated information data, and providing this adaptively adjusted resonant frequency value to the power generation means.
    Power transmission device comprising a.
  2. The method of claim 1,
    The one side wireless communication means, the power transmission device, characterized in that for receiving information data of the portable terminal using any one of induced electromotive force, RF communication, optical (LED) communication, infrared communication.
  3. Power generation means for generating outgoing power based on a resonant frequency value determined by the control means for executing the power transfer mode in response to the approach detection of the portable terminal;
    One side wireless transmission and reception means for inducing the generated transmission power to the other side wireless transmission and reception means provided on the portable terminal side;
    Means for demodulating a power value at the portable terminal received from the other wireless transmitting and receiving means into an original signal before modulation through induced electromotive force in the one wireless transmitting and receiving means;
    The control means for adaptively adjusting a resonant frequency value for generation of the output power based on the demodulated power value, and providing the adaptively adjusted resonant frequency value to the power generation means.
    Power transmission device comprising a.
  4. During the power delivery mode, the resonance frequency value is adaptively adjusted based on the power value at the portable terminal side which is wirelessly transmitted from the portable terminal side and received through the one side wireless communication means, and is generated based on the adaptively adjusted resonance frequency value. A power transmission device configured to induce power transmission power through one side wireless power transmission means and transmit the power to the portable terminal;
    Converts and outputs a power radio signal corresponding to the outgoing power received through induced electromotive force in the other side wireless power reception unit to a DC power source usable on the portable terminal side, and executes the portable terminal during execution of the power transfer mode. The mobile terminal detects a power value at the side, and wirelessly transmits the detected power value through the other side of the wireless communication means to the power transmitting apparatus.
    Contactless wireless power supply system comprising a.
  5. The method of claim 4, wherein
    The power transmission device,
    Power generation means for generating the outgoing power based on a power outgoing control value provided from a control means;
    The one side wireless power transmission means for diverting the generated transmission power to the portable terminal side;
    The one side wireless communication means for receiving a power value in the portable terminal wirelessly transmitted from the other side wireless communication means;
    Means for demodulating the received power value into an original signal before modulation;
    The control means for adaptively adjusting a resonant frequency value for generation of the outgoing power based on the demodulated power value, and providing the adaptively adjusted resonant frequency value as the power transmission control value to the power generating means.
    Contactless wireless power supply system comprising a.
  6. The method of claim 4, wherein
    The mobile terminal,
    The other wireless power receiving means for transmitting and receiving a power wireless signal through induced electromotive force with the one wireless power transmitting means;
    Power processing means for converting and outputting the power wireless signal when the power wireless signal is received through the other wireless power receiving means;
    Means for detecting power at the portable terminal side;
    Means for modulating the detected power value into a wireless transmittable signal;
    The other side wireless communication means for wirelessly transmitting the modulated power value to the one side wireless communication means
    Contactless wireless power supply system comprising a.
  7. The method according to any one of claims 4 to 6,
    The one side wireless communication means and the other side wireless communication means, the contactless wireless power supply system, characterized in that for transmitting and receiving a wireless signal using any one of induced electromotive force, RF communication, optical (LED) communication, infrared communication.
  8. The method according to any one of claims 4 to 6,
    The output power converted into DC power is provided as a charging power of the battery built in the portable terminal, characterized in that the contactless wireless power supply system.
  9. The method according to any one of claims 4 to 6,
    The output power converted into DC power is provided as the operating power of the portable terminal, the contactless wireless power supply system.
  10. During execution of the power transfer mode, the resonance frequency value is adaptively adjusted based on the power value provided from the portable terminal side, and the output power generated based on the adaptively adjusted resonance frequency value is induced through one side wireless transmission / reception means. A power transmission device for transmitting to the terminal side,
    Converts and outputs a power wireless signal corresponding to the transmitted power received through induced electromotive force in the other wireless transmission / reception unit into a DC power source usable on the portable terminal side, A portable terminal which detects a power value and transmits the detected power value to the power transmission device side through the other wireless transmission / reception means.
    Contactless wireless power supply system comprising a.
  11. The method of claim 10,
    The power transmission device,
    Power generation means for generating the outgoing power based on a power outgoing control value provided from a control means;
    The one side wireless transmission / reception means for diverting the generated transmission power to the portable terminal side;
    Means for demodulating the power value received from the portable terminal into an original signal before modulation through induced electromotive force induction at the one side wireless transmitting and receiving means;
    The control means for determining the adaptively adjusted resonant frequency value based on the demodulated power value, and providing the adaptively adjusted resonant frequency value to the power generating means as the power transmission control value.
    Contactless wireless power supply system comprising a.
  12. The method of claim 10,
    The mobile terminal,
    The other wireless transmitting and receiving means for transmitting and receiving a power wireless signal through induced electromotive force with the one wireless transmitting and receiving means;
    Power processing means for converting and outputting the power wireless signal when the power wireless signal is received through the other wireless transmitting and receiving unit;
    Means for detecting a power value at the portable terminal side, respectively;
    Means for modulating the detected power value into a signal capable of wireless transmission and transmitting the signal to the power transmission apparatus through the other wireless transmission / reception means
    Contactless wireless power supply system comprising a.
  13. The method according to any one of claims 10 to 12,
    The output power converted into DC power is provided as a charging power of the battery built in the portable terminal, characterized in that the contactless wireless power supply system.
  14. The method according to any one of claims 10 to 12,
    The output power converted into DC power is provided as the operating power of the portable terminal, the contactless wireless power supply system.
  15. During execution of the power transfer mode, the transmission power generated according to the resonant frequency value determined based on the power value provided from the portable terminal side is induced through one wireless transceiver and wirelessly transmitted to the portable terminal side, and the other side from the one wireless transceiver A non-contact wireless power supply method for converting a power wireless signal corresponding to the transmission power induced by a wireless transmission and reception into a direct current power source that can be used on the portable terminal side.
  16. The method of claim 15,
    And the power value is repeatedly provided at a predetermined cycle while the power transfer mode is executed.
  17. When the portable terminal approaches the power supply region of the power transmitting apparatus, power transmission for wirelessly transmitting the generated power generated by the power transmitting apparatus to the portable terminal through induced electromotive force between one wireless power transmitting means and the other wireless power receiving means. Running the mod,
    Converting and outputting a power wireless signal corresponding to the transmission power received through the other wireless power receiving means into a DC power source usable by the portable terminal;
    Detecting a power value on the portable terminal side during execution of the power transfer mode, wirelessly transmitting the detected power value through another wireless communication means, and transferring the detected power value to one side wireless communication means on the power transmitting device side;
    Adaptively adjusting a resonant frequency value for generation of the output power based on the power value received through the one side wireless communication means;
    Generating the transmission power using the adaptively adjusted resonant frequency value
    Contactless wireless power supply method comprising a.
  18. The method of claim 17,
    The method may be configured to perform wireless signal transmission and reception between the one side wireless communication means and the other side wireless communication means using any one of induced electromotive force, RF communication, optical (LED) communication, and infrared communication. Way.
  19. The method of claim 17,
    The detection and transmission of the power value is repeated in a predetermined cycle while the power transfer mode is executed.
  20. The method according to any one of claims 17 to 19,
    The output power converted into DC power is supplied as a charging power of a battery built in the portable terminal, characterized in that the contactless wireless power supply method.
  21. The method according to any one of claims 17 to 19,
    The output power converted into DC power is provided as the operating power of the portable terminal.
  22. When the portable terminal approaches the power supply region of the power transmitting apparatus, executing a power transmission mode for wirelessly transmitting the generated power generated by the power transmitting apparatus to the portable terminal through induced electromotive force between one side and the other wireless transmitting and receiving means; and,
    Converting and outputting a power wireless signal corresponding to the transmission power received through the other wireless transmission / reception unit into a DC power source usable by the portable terminal;
    Detecting a power value at the portable terminal side during execution of the power transfer mode, and transmitting the detected power value to the power transmission device side through induced electromotive force induced between the other side and the one side wireless transceiver;
    Adaptively adjusting a resonant frequency value for generation of the output power based on the received power value;
    Generating the transmission power using the adaptively adjusted resonant frequency value
    Contactless wireless power supply method comprising a.
  23. The method of claim 22,
    The detection and transmission of the power value is repeated in a predetermined cycle while the power transfer mode is executed.
  24. The method of claim 22 or 23,
    The output power converted into DC power is supplied as a charging power of a battery built in the portable terminal, characterized in that the contactless wireless power supply method.
  25. The method of claim 22 or 23,
    The output power converted into DC power is provided as the operating power of the portable terminal.
KR1020080074392A 2008-07-30 2008-07-30 Power transfer apparatus, non-contact wireless power supply system and method KR20100012944A (en)

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WO2011102641A2 (en) * 2010-02-16 2011-08-25 서울대학교산학협력단 Method and apparatus for transmitting multi-radio power using time division mode
WO2012064105A3 (en) * 2010-11-10 2012-07-19 Samsung Electronics Co., Ltd. Wireless power transmission system, and method of controlling transmission and reception of resonance power
WO2013012111A1 (en) * 2011-07-20 2013-01-24 엘지전자 주식회사 Two-way communication using wireless power signal
WO2013012114A1 (en) * 2011-07-21 2013-01-24 엘지전자 주식회사 Communication of wireless power receiver through wireless power signal
WO2013032129A1 (en) * 2011-08-26 2013-03-07 Lg Innotek Co., Ltd. Wireless power transmitter and wireless power transmission method
WO2013048053A1 (en) * 2011-09-30 2013-04-04 삼성전자주식회사 Portable terminal having wireless charging module
CN103545938A (en) * 2012-07-09 2014-01-29 Lg电子株式会社 Wireless power transfer method, apparatus and system
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US9172434B2 (en) 2011-06-24 2015-10-27 Samsung Electronics Co., Ltd. Communication system using wireless power
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US9362983B2 (en) 2010-04-28 2016-06-07 Samsung Electronics Co., Ltd. Method and apparatus for controlling resonance bandwidth in a wireless power transmission system
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WO2011102641A3 (en) * 2010-02-16 2012-01-12 서울대학교산학협력단 Method and apparatus for transmitting multi-radio power using time division mode
WO2011102641A2 (en) * 2010-02-16 2011-08-25 서울대학교산학협력단 Method and apparatus for transmitting multi-radio power using time division mode
US9362983B2 (en) 2010-04-28 2016-06-07 Samsung Electronics Co., Ltd. Method and apparatus for controlling resonance bandwidth in a wireless power transmission system
WO2012064105A3 (en) * 2010-11-10 2012-07-19 Samsung Electronics Co., Ltd. Wireless power transmission system, and method of controlling transmission and reception of resonance power
US9214818B2 (en) 2010-11-10 2015-12-15 Samsung Electronics Co., Ltd. Wireless power transmission system, and method of controlling transmission and reception of resonance power
US9543766B2 (en) 2010-11-10 2017-01-10 Samsung Electronics Co., Ltd. Wireless power transmission system, and method of controlling transmission and reception of resonance power
US9350193B2 (en) 2011-06-01 2016-05-24 Samsung Electronics Co., Ltd. Method and apparatus for detecting load fluctuation of wireless power transmission
US9172434B2 (en) 2011-06-24 2015-10-27 Samsung Electronics Co., Ltd. Communication system using wireless power
WO2013012111A1 (en) * 2011-07-20 2013-01-24 엘지전자 주식회사 Two-way communication using wireless power signal
US9503178B2 (en) 2011-07-20 2016-11-22 Lg Electronics Inc. Two-way communication using wireless power signal
WO2013012114A1 (en) * 2011-07-21 2013-01-24 엘지전자 주식회사 Communication of wireless power receiver through wireless power signal
US9184802B2 (en) 2011-07-21 2015-11-10 Lg Electronics Inc. Communication of wireless power receiver through wireless power signal
US9608452B2 (en) 2011-08-05 2017-03-28 Samsung Electronics Co., Ltd. Wireless power transmission system, and method and apparatus for controlling power in wireless power transmission system
US9184635B2 (en) 2011-08-26 2015-11-10 Lg Innotek Co., Ltd. Wireless power transmitter and wireless power transmission method
US9722463B2 (en) 2011-08-26 2017-08-01 Lg Innotek Co., Ltd. Wireless power transmitter and wireless power transmission method
WO2013032129A1 (en) * 2011-08-26 2013-03-07 Lg Innotek Co., Ltd. Wireless power transmitter and wireless power transmission method
US9184634B2 (en) 2011-08-26 2015-11-10 Lg Innotek Co., Ltd. Wireless power transmitter and wireless power transmission method
WO2013048053A1 (en) * 2011-09-30 2013-04-04 삼성전자주식회사 Portable terminal having wireless charging module
US9948126B2 (en) 2011-09-30 2018-04-17 Samsung Electronics Co., Ltd. Portable terminal having wireless charging module
US9287039B2 (en) 2012-07-09 2016-03-15 Lg Electronics Inc. Wireless power transfer method, apparatus and system for low and medium power
US10411517B2 (en) 2012-07-09 2019-09-10 Lg Electronics Inc. Wireless power transfer method, apparatus and system for low and medium power
CN103545938A (en) * 2012-07-09 2014-01-29 Lg电子株式会社 Wireless power transfer method, apparatus and system
US9997951B2 (en) 2012-07-09 2018-06-12 Lg Electronics Inc. Wireless power transfer method, apparatus and system for low and medium power
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